Punching-machine.



G'. J?. THOMAS.

l PUNCHII'G'` MACHINE. APPLICATION FILED 00T.11, 1907.

Patented Jam.y 5, 1909.V

2 SHEETS-SHEET l.

FIE E.

0Go 786 n 0 |1 L: 7 4 Q OQO w I. M 7A 5 91N Jl [IWW: HUWII 7 7 G. P.THUlVa Y PUNGHING MACHINE.

APPLIUATION gum 0011.11, 1907.

908,8 7a Patented 5, w09.

2 SHEETS-SHEET 2.'

WITNESSESI Y? Qfmys GEORGE P. THOMAS, `OF PITTSBURG, PENNSYLVANIA.

rimomite-ivianzianaE.A

Specication of Letters Patent.

Application lsd October 1191907. Serial No. 396,967.

Patented aan. 5, reos.`

To all 'whom it may concern.'

Be it known that I, GEQRGE P. THOMAS, residing at Pittsburg, in thecounty of Allegheny and State of Pennsylvania, a citizen of the UnitedStates, have invented or discovered certain new and useful Improve mentsin Punching-Machines,l of which im .provements the following is aspecification.

In punching plates, etc., where the posi-4 tionsof` the-holes cannot bedetermined by suitably arranged stops, great difficulty is encounteredin placing the plate or other article accurately in position under thepunch, although the points where the Vholes are to be formed-has beenpreviously marked or indicated on the plates.

The-object of the present invention is to provide for the accuratepositioning of the plate under the punch, prior to the operation of thelatter.`

rlhe invention is hereinafter more fully described and claimed.

In the accompanying drawings forming a part of this specification,lFigure 1 is a side elevation of a punch having my improvement appliedthereto; Fig. 2.is a front elevation o the machine j Fig. 3 is asectional plan, the plane of'section being indicated by the linelII-lll'Fig 1; F iff. 4 is a sectional elevation on a plane indicated by theline IV--lV Fig. l; and 5 is a detail view' illustrating avmodiicationof the sleeveshifting means;

In' the practice of my' invention the punch o erating mechanism may beof any suita le construction, --but is preferably of the type, in whichthe movementof the punch-` ing head 1 is controlledfby the operatorthrough a suitable form or construction of clutch mechanism as indicatedat 2. The head ,1' is provided with a stem 3, to which the punch 4 issecured as -by the annular nut 5 screwing into a recess in the-endof thestem, .'A guide is provided to insure the proper position of the plate,such guide being arranged in such relation to the punch that when theplate has been moved to a position Where the guide will be in line withor bear upon a certain pre-determined point on the plate to4 be unched,the oint at which the hole is to e formed will e accurately. inline withthe punch. In my preferred construction thisguide is made in thel formof a nippie constructedto move freely over the punch 4 and secured to .a'sleeve 7 movably mounted on the stem 3.

'ln using this guide it is shifted so as to ro# ject down onto the plateto be punc led, and when the plate has been moved sothat the nipple willaccurately indicate the point to be punched, the punch is operated'. Thesleeve and nipple can be operated by the hand or the foot of theoperator, but referably by the foot. To that end the s eeve 7 isconnected to one endkof a lever 8 which can be shifted by a treadle `9.'A desirable construction to this end consists of an arm 10 pivotallyconnected to the punch in such position that when moved to verticalosition it will force. the outer end. of the ever and the sleeve. 'l'hisarm lO'is connected to one arm of a bell crank lever 11 the opposite armbeing connected to the treadle by a rod 12. An efficient means forshifting the lever 8 and the sleeve is shown in Fig. 5 and consists of awedge block 10 l mounted on a suitable support on the frame of thepunch, and connected to ther bell- -wedge block being provided withstraight y portions, which come into alinement on movement of the blockand' lock the lever and sleevein stripping position.

Itis preferred that the same treadle should be used to move the sleeveand nipple and also shift the clutch so as to connect the power shaftwith the punch-head l. To this -end the treadle is connected t'ov a rod13 op- \erating the movable member of the clutch 2, in such manner thatthe rod will not be moved by the treadle until the block or arm l0 hasshifted to cause the lever to"1nove the nipple down onto theplatewhereupon `"the further movement of the treadle will shift theclutch but will not ymove the lever 8, as the straight portions a of thelever'and block bear at that time on eac-h other.

-While the plates can be supported during so mounted as to be capable ofbeing movedtowards and from each other', thus providing a stable supportfor platesvarying largely in .sisting of sections 17 and 18 hingedtogether;y

and'a plurality' of arms 15 havmg a pivotal connection to the outersection 17, such connection being the pin 16. rIhe ngers 14 are hingedas stated to the arm 15 forming the outer member of the jointed frame.This construction of Work. support, which is. also` 4adapted for usein/other metal o erations than punching, permits of a Wi e orrestricted' spread of the fingers and a movement of the fingers andarticles carried there-` by, horizontally in any direction.

ln punching lates a templet 26 is pre-` ared having ho es arranged asdesired in the nished plate and of a size to permit of the entrance ofthe end of the nipple4 6. T` g. templetvis secured on the plate bysuitablf clamps 27 and the plate placed on the supporting fingers 14.'Ihe operator presses down on the treadle at the same timeshifting theplate, until the nipple Will pass int'o orthrough a hole in the templet.As soon as the nipple has entered the hole in the templet the treadle isfurther depressed thereby shifting the movable member of the clutch andcausing the operation of the punch. Y It will be observed that' unlessthe nipple enters a hole in the templet the treadle 'cannot be movedsufficiently far to shift the'- clutch, thus rendering it necessary tobring the late in proper position before a hole can he punched.

I claim herein as Ymy invention: 1. A punching machine, having incombination a movable punch. means for operating the punch, a punchguide having predetermined osition relative to the unch, and means ormoving the punch guide towards the article tobe unched in advance of thepunch and. for hdlding the guide in contact with sucharticle afterpunch.

2. A punching machine, having in combination a movable punch, means foroperating the,punch, a dnch guide and means for moving the guide towardsthe article operated pn and controlling the operation of the unc p 3. Apunching machine, having in combination a movable punch, means foroperating the punch, a nipple surrounding the punch and means for movingthe nipple independent of the punch and holding it in ad-- vancreldposition during the retraction of the punc 4. A punching machine havingin combithe retraction of the nation a movable punch, a nipplesurrounding the punch, means for moving the nipple .independent of thepunch and means for locking the nipple when shifted.

5. A punching machine having in combination a punch, means for operatingthe punch, a nipple surrounding the punch and means for moving thenipple independent of the punchand 'controlling the punch operatingmeans.

6. A punching machine having in combination a punch, mans for operatingthe punch, a punch guide, means for moving the guide independent of thepunch and con- Y trolling the operation of the punch operating means,and means for preventing the punch controlling movementprior to the fulloperative movement of'the guide:

7. A punching machine having in'combination a punch, means for operatingthe punch,. a nipple surrounding the punch, a'

for shifting the lever, a treadle for shifting .the We dge-block,connections extending from the treadle and controlling the punchoperating means, the connections being adapted of the nipple.

8. A punching machine 'havingin combi.- nation ,a templet having holesarranged in the relation desired in the finished plate and adapted to besecured to the latter, a punch, 'means for operating the punchga nipplesurrounding the punch and means for causing the nipple to enter theholes in the templet "such position during the .retraction ofthe punch.

9. A metal Working machine having in combination therewith a pivotallyvmounted and jointed frame and a lurality ofvvork supporting fingerspivotaly connected to said frame.

v to the bracket and a plurality of Work supporting fingers connected tothe outer-arm and movable relative to each other.-

11. A metal Working machine having in combination therewith a swingingbracket, an arm pivotally connected to thebracket, a

fingers pivotally connected to the free ends of the second arms. A

In testimony whereof, I have hereunto set my hand. f

y GEORGE r. THOMAS; Witnesses: l'

ALICE A. TRrLL,

CnA'RLEs BARNETT.

lever connected to the nipple, a Wedgeblock'l` to be shifted subsequentto the movementA in advance of the punch and holding it iny 10. A metalWorking machine having in` combination therewitha swinging bracketf armspivotally connected to eachother and.

prlurality of arms pivotally connected to the" ee end ofthe first armand Work-supporting.

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